It has been a while since I have looked at Jigsaw. I examined it first back in 2007 (here and here) and we last used it in a project in 2009 (here). Back then, it was an extremely good product for a fairly narrowly focused type of analytic work.

Today, though, it appears to be a much easier to use and more general purpose type of analytic software. I was especially blown away by the use cases demonstrated in the video below. The video is a little long but worth it if you don't know a lot about the state of the art in visual analytics.